Re: Dead Samsung plasma - NOT (?) Power supply

Quick update - I didn't bother checking for shorts on the y-sus, just because I kind of thought I might as well order a new board anyway (£18) as my last chance saloon fix.

And I'm pleased to say that replacing the y-sus board instantly cured the problem. TV boots perfectly. What's slightly annoying is the new power supply I bought works, but is noisy as hell. I might try and return it. Thanks for your help everyone! Fixed without a soldering iron, just a bit of board swapping #welcometothemodernera

Bob

Re: Dead Samsung plasma - NOT (?) Power supply

I tested caps C4102, C4005 and C4004 on the power supply and they *don't* read short. So as I think we've concluded (thanks Andrew F. Ali and dick_barton) it isn't the power supply.

If I disconnect the PSU cable to the Y-sus, the Va and Vs voltages fire up to the correct voltages, and then slowly drop away (I guess this is expected behaviour).

So what not? Just buy myself a new Y-sus buffer board? I can get one off ebay for about £18 but I've already bought a power supply and logic board - pretty soon I'll...

Re: Dead Samsung plasma - NOT (?) Power supply

Brilliant, thanks - I'll look in the morning. The strange thing is though that I have two power supplies showing exactly the same symptoms.

Re: Dead Samsung plasma - NOT (?) Power supply

Quick update - I've noticed on the 'dead' side of the power supply, I get various voltage readings on this side at the same time as the 'clicking' noise. The clicking seems to be coming from the component circled....

Re: Dead Samsung plasma - NOT (?) Power supply

OK, so with a multimeter on the power supply, I can see that VS and VA fire up for a split second (to 2v and -0.15v respectively) - they fire up when the clicking noise is heard (so twice on one power supply, five times on the other). Afterwards, I can get voltage reads on the components on the left hand side of the board, but the right hand side is dead (the split is almost exactly down the middle, where the centre heatsink is - see image).

Following the helpful suggestion from dick_barton I unplugged from the mains...

Hi, I've got a dead PS43F4500AW 43" plasma. It was working fine, I switched put it in standby, 30 mins later I couldn't turn it back on again. From web research, I suspected the power supply. I couldn't see any obvious bad caps but I purchased a 'used and tested' replacement power supply board from Ebay. The TV still didn't power up. So I purchased a 'used and tested' replacement logic / main board from Ebay with exactly the same result.

With original power supply, when you plug it in the green LED on the back of the main board does a double flash and it does this twice. Every...

Re: New Members - please post your introductions here

Hi all, joined in 2010 but now 7 years later need to post to diagnose my Samsung plasma...